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Flame retardant polymeric composition

a polymer composition and flame retardant technology, applied in the field of flame retardant polymeric compositions, can solve the problems of reducing extrusion efficiency, reducing mechanical properties, and difficulty in flame retardant alpha-olefins containing vinyl acetate less than 40% by weight, and achieves the effect of improving flame retardant performance and higher performan

Active Publication Date: 2017-08-29
ITALMATCH KEMIKALS SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The combination of metal hypophosphite and hydroxide achieves superior flame retardant performance compared to existing formulations, particularly in alpha-olefins with low vinyl acetate content, with optimized FIGRA and FPI values, indicating improved fire safety and reduced filler content needs.

Problems solved by technology

One drawback in the use of metal hydroxides is clearly the high filling level which is required, that often results in reduced mechanical properties as well as reduced extrusion efficiency due to increate processing viscosities.
Alpha-olefins containing vinyl acetate lower than 40% by weight are more difficult to make flame resistant, even though they are commonly used in cables compounds because of their benefits in processing and mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0076]In Examples 2 and 3 (indicated in the following Table 1 as E.2 and E.3) and Comparative Example 1,4,5,6,7,8,9 (indicated in the following Table 1 as C.1, C.4-C.9) (Table 1), cone calorimeter results are reported as well as the corresponding FIGRA and FPI for EVA based formulations at 65% total loading of filler by weight were calculated. Comparing C. 1 and C. 9, we can observe that FPI values of compositions containing Aluminum hypophosphite (C.9) are worse than those of the compositions containing an equal amount of Aluminum hydroxide (C.1). Comparing FIGRA and FPI values of C.7 and C.8 (realized according to WO 2009 / 010812) with corresponding values reported for C. 9, we can observe an improvement in flame retardancy properties, notwithstanding this improvement is not sufficient to be compared to C. 1 value. Increasing the ratio of Aluminum hydroxide to Aluminum hypophosphite (C.6, C.5, C.4) flame retardant properties decrease dramatically in terms of FIGRA and FPI values. S...

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Abstract

The invention disclose halogen free thermoplastic or cross linked polymers compositions comprising a polyolefin and / or a polyolefin containing polar co-monomers and a combination of metal hydroxides and inorganic hypophosphite as a synergic, and optionally other ingredients. These compositions show a superior balance of flame retardant properties compared to already known corresponding halogen free formulations. Molded items obtained using the polymer composition according to the present invention are useful in a wide range of injection molding and extrusion applications, especially cables.

Description

[0001]This application is the U.S. national phase of International Application No. PCT / EP2013 / 000376, filed 8 Feb. 2013, which designated the U.S.; the entire content of which is hereby incorporated by reference.SUBJECT OF THE INVENTION[0002]The invention disclose halogen free thermoplastic or cross linked polymers compositions comprising a polyolefin and / or a polyolefin containing polar co-monomers and a combination of metal hydroxides and inorganic hypophosphite as a synergic, and optionally other ingredients. These compositions show a superior balance of flame retardant properties compared to already known corresponding halogen free formulations. Molded items obtained using the polymer composition according to the present invention are useful in a wide range of injection molding and extrusion applications, especially cables.BACKGROUND OF THE INVENTION[0003]Organic halogen compounds are widely used to impart flame retardancy to organic polymers.[0004]Organic halogen however do gen...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C08K3/32C08K5/5419C08L23/08C08L31/04C08L83/06C08K5/00C08K3/22C08K3/00
CPCC08K3/32C08K3/22C08K5/5419C08L23/0815C08L23/0853C08L31/04C08L83/06C08L51/06C08K3/0058C08K5/0066C08K2003/2224C08K2003/2227C08K3/016
Inventor ZUCCHELLI, UGO
Owner ITALMATCH KEMIKALS SPA